Allied Telesis AT-AR215 - ADSL USB Modem for ISDN. Internal memory: 32 MB, Interface: USB Port, Type: ADSL USB Modem. Upstream data rate: 1 Mbit/s, Downstream data rate: 8 Mbit/s. Operating temperature range (T-T): 10 - 45 °C, Operating relative humidity range: 30 - 80 %, Storage temperature range (T-T): 10 - 45 °C. Dimensions (WxDxH): 120 x 84 x 24 mm. Built-in processor: Pentium II 233 MHz / above with USB port